Shredding machine



March 4 1924.

S. KORBULY SHREDDING MACHINE Filed Nov. 2 9. 1920 2 Sheets-Sheet 1 fwl/enz df fin/Z0 6 Mid JZ/ii f/ March 4, 1924. 1,485,418

s. KORBULY SHREIiDING MACHINE Filed Nov. 29; 1920 2 Sheets-Sheet 2 -TITIIIIIIf' v In veg/far;

afa Za A 1 4 7 Patented er. 4, 1924.

SANDOR KORBULY, OF BUDAPEST, HUNGARY, 'ASSIGNOR T0 BORIS Axvns, or

BUDAPEST, HUNGARY. I

SHEEDDI'NG ivrlioinl in.

Application filed November 29, 1920. Serial N 0. 427,193.

To all whom it may concern:

Be it known that I, SANDoR KORBULY, en gineer, a cltizen of Hungary, residlng at Budapest, in'the Kingdom of. Hungary, 7

acterized by disc cutters mounted in a longi tudinally adjustable manner on the cutter spindles and provided with identical cutting edges on both sides, said cutters being pressed into intimate contact with each other at the cutting pointby pressure devices acting in the axial direction, so that the disc cutters cut with both edges, and the cutters or knives of one spindle, form distance pieces determining the distance apart of the cutters of the other spindle. Owing to this arrangement, it is possible to build'a very simple machine for simultaneously cutting a comparatively large number of narrow strips, which may have a width as low as 0.3 The accompanying drawingshows by way of example a tobacco shredding machine for hand operation. Figure 1 isa cross-section of the machine arranged within a closed casing.

Figure 2 hows themachine on a smaller scale with the casing open.

Figure 3 is a longitudinal section of the casing on line 33 of Figure 2.

Figures 4 and 5 are respectively a front elevation and the casing. 7

On the two parallel spindles 1 and 2 are mounted a series of cutter discs 3 and 4:,

preferably stamped out of sheet iron or steel. The cutter discs are mounted in such a manner'that they are loosely adjustable in the axial direction, but prevented fromturning relatively to the spindles say by means ofthe keys 5, 6. Between the disc cutters 3 and 4 are arranged spacing .discs 7 and 8 of a considerably smaller diameter than that of the disc cutters. These spacing discs are also longitudinally adjustable on the cutter spindles; The distancebetween the cutter plan of the machine, without I spindles is less than the diameter of thefdisc cutters, so that the cutters of one spindle en gage between the cuttersrof the other spindle. The disc cutters have a cylindrical surface,

so that they cut at both edges.

Ateachend of he series of cutter discs is arranged afpressure roller 9 or 10 sup-1 portedby spring arms 11'or 12, secured to the: mach ne frame. The pressure rollers 9, 10; V exerclseat thejp'oint of engagement'of the,

discjcu'tt'ers a pressurein the axial direction whichforces' the cutting edges of the cutters into close contact with each other. The spacing discs limitthe pressure of the cutters} against each other, as they are very slightly less in thickness than the cutters. As all the discs are splined onto the spindles, the

pressure-of the pressure rollers is uniformly distributed on all the disc cutters and re mains uniform during the rotation'of the cutters. The cutters of one spindle completely fill the intervals between the cutters of theother spindle, and the width of the strips cut corresponds to the thi k e cutter discs,

On one of the cutter spindles is mounted an operating crank 13. The other spindle may be drivenby friction or by means of toothed wheels 50, 51. 'Divergent' take-ofl fingers 14,15 project at the discharge side between the cutters. The take-0E fingers are also stamped out of thin sheet metal and are mountedon rods 1'6 parallel to the cutter spindles. .The take-off fingers are providedwith "guide plates 17 0r'.18 which are hinged about rods 19,20;

Owing to the cutter discs being cylindrical,

it is p'ossible'to keep the cutters very sharp I in a very simple manner'and to sharpen them durin' the working. To that end,

the guide p ates 17 ,"18 are provided with interchangeable thin steel blades 21.,"22 which are pressed by springs23,24r against the peripheries of the disccutters 3, 4, and.

grindthem during rotati on.- In order to prevent the edgesjof the cutter discs from eating into the grinding blades and from becoming themslves ground to round shape, 7

the grinding blades 21, 22 are automatically 7 I oscillated longitudinallydurin the working of the'machine. "To that en in the construction illustrated, the guide plates 17 18 are mounted for instance'on the rods 19,

2O in a longitudinally movable mannerand" engage by means of pins 25, 26 with the bifurcated ends of levers 27 or 28. The levers 27, 28 are mounted on a rotatable vertical spindle 29. The arm 30 of the lever 27 engages by means of a pin 31 with a groove 32 in a cam-drum 33 mounted on the cutter spindle 2 which during the rotation of the spindle, imparts an oscillating motion to the said levers.

For facilitating transport, the machine is enclosed into a casing which is utilized as the feed table during working.

At the level of the nip of the two cutter rollers, the casing is divided and connected by a hinge 34 by means of which the troughshaped upper part 35 is formed, said part being hinged to the rear Wall 36. The latter is secured to a bed plate 37 preferably made of wood,'to which the machine is bolted. The hollow space in the bed 37 is utilized for housing the crank 13 and other auxiliaries such as lubricators, spanners etc., and is closed at the bottom by a detachable plate 38. To the upper part 35 of the casing are connected, by means of hinges 44, side flaps or plates 40 and by means of a hinge 41, the front flap 42. The bottom edges of the flaps 40 and 42 are connected by suitable means at 39 to the bottom plate 38, or at 45 to the bed plate 37 The method of arranging the machine for working is as follows:

After disconnecting the locking devices at 39 and 45, the bottom plate 38 is removed, and the upper part 35 of the casing is turned about the hinges 34 into the position shown in Figure 2. The front flap 42 is brought into horizontal position (Figure 2) and secured by laterally turning support 43, whilst the lateral flaps40 depend vertically downwards (Figure 3). The bottom plate 38 is then turned with its inner side downwards and placed on the turned down upper part 35 (Figure 3) so that the said bottom plate can be used as a feed table for the material to be out. To that end, the plate 38 is provided with hinged guide strips 46 which together with the guide strips 48 provided on the table plate 47 of the machine, form a limit for the feeding, corresponding 'to the length of the cutter rolls. The crank '13 is mounted on the spindle 1 and secured in a suitable manner.

The machine is then ready for working and is operated in the following manner:

The tobacco leaves to be out are placed on the table 38, 47 and, the crank 13 being rotated, the tobacco leaves are fed towards the cutter rolls. The cutter rolls, draw the leaves between them and cut them into narrow strips, the width of which corresponds to the thickness of the cutter discs. The take-off fingers 14, 15 guide the cut tobacco between the plates 17, 18, whereupon it slides down the plate 46.

During the rotation of the spindle 2, the cam groove 32 oscillates the steel grinding strips 21, 22 which keep the cutter discs sharp.

The improved machine is distinguished not only by its great output, compared to the well known tobacco cutting machines working like shavers or planers, but also by the fact that stoppages during working due to the frequent sharpening of the cutters, are dispensed with, and further by the fact that the machine works perfectly notwithstanding the variation in'the proportion of moisture in the tobacco.

The machine may also be used with advantage for cutting materials other than tobacco, for instance damaged paper, or for destroying documents to be pulped.

- WVhat I claim is:

1. In a shredding machine, a rotary shaft, axially movable cutter discs thereon forming a cutting roller, a second rotary shaft parallel with the first one and axially movable cutter discs thereon projecting into the spaces between the adjacent cutter discs of the first cutting roller, means to prevent the rotation of the cutter discs on their respective shafts, pressure rollers acting against the lateral faces of the cutting rollers in the plane of their nip and springs acting on said pressure rollers.

2. In a shredding machine, a rotary shaft, axially movable cutter discs thereon, a second rotary shaft parallel with the first one and axially movable cutter discs thereon projecting into the spaces between the adj acent cutter discs of the first rotary shaft, means to prevent the rotation of the cutter discs on their respective shafts, yielding means to exert a pressure in axial direction on said cutter discs in the plane of their nip, blades of harder metal than the cutter discs pressed against the periphery of the cutter discs and means to reciprocate said blades in axial direction.

3. In a shredding machine, a rotary shaft, axially movable cutter discs with symmetrical cutting edges thereon, a second rotary shaft parallel with the first one and axially movable cutter discs thereon projecting into the spaces between the adjacent cutter discs of the first rotary shaft, means to prevent the rotation of the cutter discs on their respective shafts, yielding means to exert a pressure in axial direction on said cutter discs in the plane of their nip, blades of harder metal than the cutter discs pressed against the periphery of the cutter discs and means to reciprocate said blades in axial direction.

4. In a. shredding machine, a rotary shaft,

axially movable cutter discs thereon form ing a cutting roller, a second rotary shaft parallel with the first one and axially movable cutter discs thereon projecting into the spaces between the adjacent cutter discs of riphery of the cutter discs and means to rethe first cutting roller, means to prevent the ciprocate said blades in axial direction. 10 rotation of the cutter discs on their respec- In testimony whereof I aflix my signature tive shafts, pressure rollers actingagainst in presence of two Witnesses.

the lateral faces of the cutting rollers in the SA D'O K U plane of their nip and springs acting on a 7 said pressure rollers, blades of harder metal than the cutter discs pressed against the pe- 'Witnes'ses:

EUGENE HARSANYI, GHAs. MEDGYES. 

